Sinoatrial Node

Medical Dictionary -> Sinoatrial Node

Sinoatrial Node


The small mass of modified cardiac muscle fibers located at the junction of the superior vena cava (VENA CAVA, SUPERIOR) and right atrium. Contraction impulses probably start in this node, spread over the atrium (HEART ATRIUM) and are then transmitted by the atrioventricular bundle (BUNDLE OF HIS) to the ventricle (HEART VENTRICLE).


© MedicalDictionaryweb.com 2012 | Contact Us | Terms of Use | Teeth Whitening | Low Carb Foods and Diets